/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.connector.base.source.hybrid;

import org.apache.flink.api.connector.source.SourceSplit;

import java.util.ArrayList;
import java.util.List;
import java.util.Objects;

/** Source split that wraps the actual split type. */
public class HybridSourceSplit implements SourceSplit {

    private final SourceSplit wrappedSplit;
    private final int sourceIndex;

    public HybridSourceSplit(int sourceIndex, SourceSplit wrappedSplit) {
        this.sourceIndex = sourceIndex;
        this.wrappedSplit = wrappedSplit;
    }

    public int sourceIndex() {
        return this.sourceIndex;
    }

    public SourceSplit getWrappedSplit() {
        return wrappedSplit;
    }

    @Override
    public String splitId() {
        return wrappedSplit.splitId();
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        HybridSourceSplit that = (HybridSourceSplit) o;
        return sourceIndex == that.sourceIndex && wrappedSplit.equals(that.wrappedSplit);
    }

    @Override
    public int hashCode() {
        return Objects.hash(wrappedSplit, sourceIndex);
    }

    @Override
    public String toString() {
        return "HybridSourceSplit{"
                + "realSplit="
                + wrappedSplit
                + ", sourceIndex="
                + sourceIndex
                + '}';
    }

    public static List<HybridSourceSplit> wrapSplits(
            int readerIndex, List<? extends SourceSplit> state) {
        List<HybridSourceSplit> wrappedSplits = new ArrayList<>(state.size());
        for (SourceSplit split : state) {
            wrappedSplits.add(new HybridSourceSplit(readerIndex, split));
        }
        return wrappedSplits;
    }

    public static List<SourceSplit> unwrapSplits(List<HybridSourceSplit> splits) {
        List<SourceSplit> unwrappedSplits = new ArrayList<>(splits.size());
        for (HybridSourceSplit split : splits) {
            unwrappedSplits.add(split.getWrappedSplit());
        }
        return unwrappedSplits;
    }
}
